Friction -an important force
Definition :
Friction is a force that tries to stop things from sliding or moving.
Main Points
Friction happens when two surfaces touch.
It always acts in the opposite direction of movement.
Rough surfaces create more friction.
Smooth surfaces create less friction.
Friction can be helpful or unhelpful.
Interesting Points
Friction makes it possible to walk without slipping.
Car tyres need friction to stop safely.
Rubbing your hands creates heat because of friction.
Without friction, everything would slide forever!
Fun Fact:
If Earth had no friction, you couldn’t even sit on a chair—you would just slide off!
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